Custom Made 57mm Diameter (2-1/4") Magnets. These custom made magnets are the perfect take-away promotional merchandise item. Custom-made promotional magnets are produced with your supplied design; perfect for promotion, awareness, fundraising and any other purpose you can think of! Our custom-made magnets are made from all metal components able to hold multiple A4 pages, postcards, menus, photographs, brochures and more to the front of your fridge or any other magnetic metal surface.